The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b472bbd660da7bbdeb87dad99f1b66e7539c107d

commit b472bbd660da7bbdeb87dad99f1b66e7539c107d
Author: Jean-François Geyelin <jif@chromium.org>
Date: Wed Sep 13 15:30:45 2017

Have the toolbar's KAV respect the safeAreaLayoutGuide on iOS11.

Bug:  764692 
Change-Id: I3e2493f770e8218aa9a5eb0351dfc0db0612832d
Reviewed-on: https://chromium-review.googlesource.com/664809
Commit-Queue: Jean-François Geyelin <jif@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#501638}
[modify] https://crrev.com/b472bbd660da7bbdeb87dad99f1b66e7539c107d/ios/chrome/browser/ui/toolbar/keyboard_assist/toolbar_keyboard_accessory_view.mm

Merge approved upon verification of the fix on Trunk before merging and on branch 3202 after merging.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/17d5d839a1dd1a8d2be9be67769ed24bebdac7cb

commit 17d5d839a1dd1a8d2be9be67769ed24bebdac7cb
Author: Jean-François Geyelin <jif@chromium.org>
Date: Wed Sep 13 18:33:15 2017

Revert "Have the toolbar's KAV respect the safeAreaLayoutGuide on iOS11."

This reverts commit b472bbd660da7bbdeb87dad99f1b66e7539c107d.

Reason for revert: Fix will need to be cherry-picked to M62.
I'd rather cherry-pick a single CL instead of a pair of CLs.

Original change's description:
> Have the toolbar's KAV respect the safeAreaLayoutGuide on iOS11.
> 
> Bug:  764692 
> Change-Id: I3e2493f770e8218aa9a5eb0351dfc0db0612832d
> Reviewed-on: https://chromium-review.googlesource.com/664809
> Commit-Queue: Jean-François Geyelin <jif@chromium.org>
> Reviewed-by: Gauthier Ambard <gambard@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#501638}

TBR=jif@chromium.org,gambard@chromium.org

Change-Id: I46fa0684c2de2fb3298232c07165d7aa2362bc77
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug:  764692 
Reviewed-on: https://chromium-review.googlesource.com/665457
Reviewed-by: Jean-François Geyelin <jif@chromium.org>
Commit-Queue: Jean-François Geyelin <jif@chromium.org>
Cr-Commit-Position: refs/heads/master@{#501702}
[modify] https://crrev.com/17d5d839a1dd1a8d2be9be67769ed24bebdac7cb/ios/chrome/browser/ui/toolbar/keyboard_assist/toolbar_keyboard_accessory_view.mm

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a371f7bb794ce9ded2c16556822620624d4032fc

commit a371f7bb794ce9ded2c16556822620624d4032fc
Author: Jean-François Geyelin <jif@chromium.org>
Date: Wed Sep 13 20:27:24 2017

Reland "Have the toolbar's KAV respect the safeAreaLayoutGuide on iOS11"

Original CL ( https://chromium-review.googlesource.com/664809 ) had debugging
leftovers.

https://drive.google.com/open?id=0Bw-kA2pwDsU-a3BiUFB4Zl9tV3M
https://drive.google.com/open?id=0Bw-kA2pwDsU-bERYb1VrdjRTMm8

Bug:  764692 
Change-Id: I31026c24f8c0e7137950fe568bb831b813afc88d
Reviewed-on: https://chromium-review.googlesource.com/664891
Reviewed-by: Justin Cohen <justincohen@chromium.org>
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#501737}
[modify] https://crrev.com/a371f7bb794ce9ded2c16556822620624d4032fc/ios/chrome/browser/ui/toolbar/keyboard_assist/toolbar_keyboard_accessory_view.mm

Are you still planning to merge this?

Oh yes.
Only the reland ( a371f7bb794ce9ded2c16556822620624d4032fc ) needs to be cherry-picked.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/97455ea878d0a16b42c21605f3a24f135700cf04

commit 97455ea878d0a16b42c21605f3a24f135700cf04
Author: Jean-François Geyelin <jif@chromium.org>
Date: Fri Sep 15 15:50:26 2017

Add SafeAreaLayoutGuideForView compatibility helper.

Helper to simplify autolayout code needing the
iOS11-only safeAreaLayoutGuide.

Bug:  764692 
Change-Id: I0ba706ba207c33425aeb7ceac7f179df46c89485
Reviewed-on: https://chromium-review.googlesource.com/667478
Commit-Queue: Jean-François Geyelin <jif@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Reviewed-by: Jean-François Geyelin <jif@chromium.org>
Cr-Commit-Position: refs/heads/master@{#502268}
[modify] https://crrev.com/97455ea878d0a16b42c21605f3a24f135700cf04/ios/chrome/browser/ui/toolbar/keyboard_assist/toolbar_keyboard_accessory_view.mm
[modify] https://crrev.com/97455ea878d0a16b42c21605f3a24f135700cf04/ios/chrome/browser/ui/util/BUILD.gn
[modify] https://crrev.com/97455ea878d0a16b42c21605f3a24f135700cf04/ios/chrome/browser/ui/util/constraints_ui_util.h
[modify] https://crrev.com/97455ea878d0a16b42c21605f3a24f135700cf04/ios/chrome/browser/ui/util/constraints_ui_util.mm
[add] https://crrev.com/97455ea878d0a16b42c21605f3a24f135700cf04/ios/chrome/browser/ui/util/constraints_ui_util_unittest.mm

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f808a21aa88678fe977986eac221cea4195a0988

commit f808a21aa88678fe977986eac221cea4195a0988
Author: Jean-François Geyelin <jif@chromium.org>
Date: Mon Sep 18 13:22:45 2017

Reland "Have the toolbar's KAV respect the safeAreaLayoutGuide on iOS11"

Original CL ( https://chromium-review.googlesource.com/664809 ) had debugging
leftovers.

https://drive.google.com/open?id=0Bw-kA2pwDsU-a3BiUFB4Zl9tV3M
https://drive.google.com/open?id=0Bw-kA2pwDsU-bERYb1VrdjRTMm8

Bug:  764692 
Change-Id: I31026c24f8c0e7137950fe568bb831b813afc88d
Reviewed-on: https://chromium-review.googlesource.com/664891
Reviewed-by: Justin Cohen <justincohen@chromium.org>
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#501737}(cherry picked from commit a371f7bb794ce9ded2c16556822620624d4032fc)
Reviewed-on: https://chromium-review.googlesource.com/671003
Reviewed-by: Jean-François Geyelin <jif@chromium.org>
Cr-Commit-Position: refs/branch-heads/3202@{#283}
Cr-Branched-From: fa6a5d87adff761bc16afc5498c3f5944c1daa68-refs/heads/master@{#499098}
[modify] https://crrev.com/f808a21aa88678fe977986eac221cea4195a0988/ios/chrome/browser/ui/toolbar/keyboard_assist/toolbar_keyboard_accessory_view.mm

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d15bb2b94e8860a36c64851ce0c7221df07cbc2b

commit d15bb2b94e8860a36c64851ce0c7221df07cbc2b
Author: Jean-François Geyelin <jif@chromium.org>
Date: Mon Sep 18 13:24:20 2017

Add SafeAreaLayoutGuideForView compatibility helper.

Helper to simplify autolayout code needing the
iOS11-only safeAreaLayoutGuide.

Bug:  764692 
Change-Id: I0ba706ba207c33425aeb7ceac7f179df46c89485
Reviewed-on: https://chromium-review.googlesource.com/667478
Commit-Queue: Jean-François Geyelin <jif@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Reviewed-by: Jean-François Geyelin <jif@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#502268}(cherry picked from commit 97455ea878d0a16b42c21605f3a24f135700cf04)
Reviewed-on: https://chromium-review.googlesource.com/671083
Cr-Commit-Position: refs/branch-heads/3202@{#284}
Cr-Branched-From: fa6a5d87adff761bc16afc5498c3f5944c1daa68-refs/heads/master@{#499098}
[modify] https://crrev.com/d15bb2b94e8860a36c64851ce0c7221df07cbc2b/ios/chrome/browser/ui/toolbar/keyboard_assist/toolbar_keyboard_accessory_view.mm
[modify] https://crrev.com/d15bb2b94e8860a36c64851ce0c7221df07cbc2b/ios/chrome/browser/ui/util/BUILD.gn
[modify] https://crrev.com/d15bb2b94e8860a36c64851ce0c7221df07cbc2b/ios/chrome/browser/ui/util/constraints_ui_util.h
[modify] https://crrev.com/d15bb2b94e8860a36c64851ce0c7221df07cbc2b/ios/chrome/browser/ui/util/constraints_ui_util.mm
[add] https://crrev.com/d15bb2b94e8860a36c64851ce0c7221df07cbc2b/ios/chrome/browser/ui/util/constraints_ui_util_unittest.mm

Fix has been merged to 62.